public String filter(String key, String value) {
boolean left = false;
boolean right = false;
String trim = value.trim();
if (trim.startsWith(commentRight)) {
value = value.substring(value.indexOf(commentRight) + commentRight.length());
left = true;
}
if (trim.endsWith(commentLeft)) {
value = value.substring(0, value.lastIndexOf(commentLeft));
right = true;
}
if (removeDirectiveBlankLine && (left || right)) {
value = StringUtils.trimBlankLine(value, left, right);
}
return value;
}
@Test
public void testTrimBlankLine() {
assertEquals("12345678", StringUtils.trimBlankLine("12345678"));
assertEquals("", StringUtils.escapeString(StringUtils.trimBlankLine("\t\r\b\f ")));
assertEquals("", StringUtils.escapeString(StringUtils.trimBlankLine("\n\t\b\f ")));
assertEquals("", StringUtils.escapeString(StringUtils.trimBlankLine("\t\b\f \n")));
assertEquals(
StringUtils.escapeString("\t\r"),
StringUtils.escapeString(StringUtils.trimBlankLine("\n\t\r\b\f ")));
assertEquals(
StringUtils.escapeString("\b\f \n"),
StringUtils.escapeString(StringUtils.trimBlankLine("\t\r\b\f \n")));
assertEquals(
StringUtils.escapeString("\b\f \n\t\n"),
StringUtils.escapeString(StringUtils.trimBlankLine("\t\r\b\f \n\t\n")));
assertEquals(
StringUtils.escapeString("1\t2\n3\r4\b5\f6 \t7 \t\n\r\b\f8\n\t\r\b\f\n"),
StringUtils.escapeString(
StringUtils.trimBlankLine("1\t2\n3\r4\b5\f6 \t7 \t\n\r\b\f8\n\t\r\b\f\n")));
assertEquals(
StringUtils.escapeString("\b\f\n1\t2\n3\r4\b5\f6 \t7 \t\n\t\n\r\b\f8\n\t\r"),
StringUtils.escapeString(
StringUtils.trimBlankLine(
" \t\r\b\f\n1\t2\n3\r4\b5\f6 \t7 \t\n\t\n\r\b\f8\n\t\r\b\f ")));
assertEquals(
StringUtils.escapeString("\t\r\b\f\n1\t2\n3\r4\b5\f6 \t7 \t\n\t\n\r\b\f8\n\t\r\b\f\n"),
StringUtils.escapeString(
StringUtils.trimBlankLine(
" \t\n\t\r\b\f\n1\t2\n3\r4\b5\f6 \t7 \t\n\t\n\r\b\f8\n\t\r\b\f\n\t ")));
// LF
assertEquals("", StringUtils.trimBlankLine("\n"));
assertEquals("\n", StringUtils.trimBlankLine("\n\n"));
// CRLF
assertEquals("", StringUtils.trimBlankLine("\r\n"));
assertEquals("\r\n", StringUtils.trimBlankLine("\r\n\r\n"));
// CR
assertEquals("", StringUtils.trimBlankLine("\r"));
assertEquals("\r", StringUtils.trimBlankLine("\r\r"));
// Mix
assertEquals("\r\n", StringUtils.trimBlankLine("\r\r\n"));
// with blanks
assertEquals("", StringUtils.trimBlankLine(" \t \n \t "));
assertEquals("\n", StringUtils.trimBlankLine(" \t \n\n \t "));
}